diff --git a/include/rapidjson/istreamwrapper.h b/include/rapidjson/istreamwrapper.h
index 066fabd..412509b 100644
--- a/include/rapidjson/istreamwrapper.h
+++ b/include/rapidjson/istreamwrapper.h
@@ -13,6 +13,7 @@
 // specific language governing permissions and limitations under the License.
 
 #include "stream.h"
+#include <iosfwd>
 
 #ifdef __clang__
 RAPIDJSON_DIAG_PUSH
@@ -38,10 +39,10 @@ RAPIDJSON_NAMESPACE_BEGIN
 */
    
 template <typename StreamType>
-class IStreamWrapper {
+class BasicIStreamWrapper {
 public:
     typedef typename StreamType::char_type Ch;
-    IStreamWrapper(StreamType& stream) : stream_(stream), count_(), peekBuffer_() {}
+    BasicIStreamWrapper(StreamType& stream) : stream_(stream), count_(), peekBuffer_() {}
 
     Ch Peek() const { 
         typename StreamType::int_type c = stream_.peek();
@@ -91,6 +92,9 @@ private:
     mutable Ch peekBuffer_[4];
 };
 
+typedef BasicIStreamWrapper<std::istream> IStreamWrapper;
+typedef BasicIStreamWrapper<std::wistream> WIStreamWrapper;
+
 #ifdef __clang__
 RAPIDJSON_DIAG_POP
 #endif
diff --git a/include/rapidjson/ostreamwrapper.h b/include/rapidjson/ostreamwrapper.h
index 4cf407e..127deb3 100644
--- a/include/rapidjson/ostreamwrapper.h
+++ b/include/rapidjson/ostreamwrapper.h
@@ -13,6 +13,7 @@
 // specific language governing permissions and limitations under the License.
 
 #include "stream.h"
+#include <iosfwd>
 
 #ifdef __clang__
 RAPIDJSON_DIAG_PUSH
@@ -38,10 +39,10 @@ RAPIDJSON_NAMESPACE_BEGIN
 */
    
 template <typename StreamType>
-class OStreamWrapper {
+class BasicOStreamWrapper {
 public:
     typedef typename StreamType::char_type Ch;
-    OStreamWrapper(StreamType& stream) : stream_(stream) {}
+    BasicOStreamWrapper(StreamType& stream) : stream_(stream) {}
 
     void Put(Ch c) {
         stream_.put(c);
@@ -62,6 +63,9 @@ private:
     StreamType& stream_;
 };
 
+typedef BasicOStreamWrapper<std::ostream> OStreamWrapper;
+typedef BasicOStreamWrapper<std::wostream> WOStreamWrapper;
+
 #ifdef __clang__
 RAPIDJSON_DIAG_POP
 #endif
diff --git a/test/unittest/istreamwrappertest.cpp b/test/unittest/istreamwrappertest.cpp
index 9d9ff2f..f6b0fa9 100644
--- a/test/unittest/istreamwrappertest.cpp
+++ b/test/unittest/istreamwrappertest.cpp
@@ -29,7 +29,7 @@ static void TestStringStream() {
 
     {
         StringStreamType iss;
-        IStreamWrapper<StringStreamType> is(iss);
+        BasicIStreamWrapper<StringStreamType> is(iss);
         EXPECT_EQ(0, is.Tell());
         if (sizeof(Ch) == 1) {
             EXPECT_EQ(0, is.Peek4());
@@ -43,7 +43,7 @@ static void TestStringStream() {
     {
         Ch s[] = { 'A', 'B', 'C', '\0' };
         StringStreamType iss(s);
-        IStreamWrapper<StringStreamType> is(iss);
+        BasicIStreamWrapper<StringStreamType> is(iss);
         EXPECT_EQ(0, is.Tell());
         if (sizeof(Ch) == 1)
             EXPECT_EQ(0, is.Peek4()); // less than 4 bytes
@@ -61,7 +61,7 @@ static void TestStringStream() {
     {
         Ch s[] = { 'A', 'B', 'C', 'D', 'E', '\0' };
         StringStreamType iss(s);
-        IStreamWrapper<StringStreamType> is(iss);
+        BasicIStreamWrapper<StringStreamType> is(iss);
         if (sizeof(Ch) == 1) {
             const Ch* c = is.Peek4();
             for (int i = 0; i < 4; i++)
@@ -118,8 +118,8 @@ static bool Open(FileStreamType& fs, const char* filename) {
 TEST(IStreamWrapper, ifstream) {
     ifstream ifs;
     ASSERT_TRUE(Open(ifs, "utf8bom.json"));
-    IStreamWrapper<ifstream> isw(ifs);
-    EncodedInputStream<UTF8<>, IStreamWrapper<ifstream> > eis(isw);
+    IStreamWrapper isw(ifs);
+    EncodedInputStream<UTF8<>, IStreamWrapper> eis(isw);
     Document d;
     EXPECT_TRUE(!d.ParseStream(eis).HasParseError());
     EXPECT_TRUE(d.IsObject());
@@ -129,8 +129,8 @@ TEST(IStreamWrapper, ifstream) {
 TEST(IStreamWrapper, fstream) {
     fstream fs;
     ASSERT_TRUE(Open(fs, "utf8bom.json"));
-    IStreamWrapper<fstream> isw(fs);
-    EncodedInputStream<UTF8<>, IStreamWrapper<fstream> > eis(isw);
+    IStreamWrapper isw(fs);
+    EncodedInputStream<UTF8<>, IStreamWrapper> eis(isw);
     Document d;
     EXPECT_TRUE(!d.ParseStream(eis).HasParseError());
     EXPECT_TRUE(d.IsObject());
@@ -147,9 +147,9 @@ TEST(IStreamWrapper, wifstream) {
     ASSERT_TRUE(Open(ifs, "utf16bebom.json"));
     ifs.imbue(std::locale(ifs.getloc(),
        new std::codecvt_utf16<wchar_t, 0x10ffff, std::consume_header>));
-    IStreamWrapper<wifstream> isw(ifs);
+    WIStreamWrapper isw(ifs);
     GenericDocument<UTF16<> > d;
-    d.ParseStream<kParseDefaultFlags, UTF16<>, IStreamWrapper<wifstream> >(isw);
+    d.ParseStream<kParseDefaultFlags, UTF16<>, WIStreamWrapper>(isw);
     EXPECT_TRUE(!d.HasParseError());
     EXPECT_TRUE(d.IsObject());
     EXPECT_EQ(5, d.MemberCount());
@@ -160,9 +160,9 @@ TEST(IStreamWrapper, wfstream) {
     ASSERT_TRUE(Open(fs, "utf16bebom.json"));
     fs.imbue(std::locale(fs.getloc(),
        new std::codecvt_utf16<wchar_t, 0x10ffff, std::consume_header>));
-    IStreamWrapper<wfstream> isw(fs);
+    WIStreamWrapper isw(fs);
     GenericDocument<UTF16<> > d;
-    d.ParseStream<kParseDefaultFlags, UTF16<>, IStreamWrapper<wfstream> >(isw);
+    d.ParseStream<kParseDefaultFlags, UTF16<>, WIStreamWrapper>(isw);
     EXPECT_TRUE(!d.HasParseError());
     EXPECT_TRUE(d.IsObject());
     EXPECT_EQ(5, d.MemberCount());
diff --git a/test/unittest/ostreamwrappertest.cpp b/test/unittest/ostreamwrappertest.cpp
index ba231bd..a94b980 100644
--- a/test/unittest/ostreamwrappertest.cpp
+++ b/test/unittest/ostreamwrappertest.cpp
@@ -29,7 +29,7 @@ static void TestStringStream() {
 
     Ch s[] = { 'A', 'B', 'C' };
     StringStreamType oss(s);
-    OStreamWrapper<StringStreamType> os(oss);
+    BasicOStreamWrapper<StringStreamType> os(oss);
     for (size_t i = 0; i < 3; i++)
         os.Put(s[i]);
     os.Flush();
@@ -54,7 +54,7 @@ TEST(OStreamWrapper, wstringstream) {
 }
 
 TEST(OStreamWrapper, cout) {
-    OStreamWrapper<ostream> os(cout);
+    OStreamWrapper os(cout);
     const char* s = "Hello World!\n";
     while (*s)
         os.Put(*s++);
@@ -70,7 +70,7 @@ static void TestFileStream() {
     const char* s = "Hello World!\n";
     {
         ofstream ofs(filename, ios::out | ios::binary);
-        OStreamWrapper<ofstream> osw(ofs);
+        BasicOStreamWrapper<ofstream> osw(ofs);
         for (const char* p = s; *p; p++)
             osw.Put(*p);
         osw.Flush();